I was just wondering, how do I make mods for GTA IV? Are there any particular free programs that I can use? I've been wanting to create Kamen Rider mods for Niko for some time now, haven't seen anyone make any. Is it harder to make mods from scratch, or from conversions? And for conversions, where can I find original character models (ex. Darth Maul from The Force Unleashed) to convert into GTA IV files? Do I even need the original models for the conversion?